Static and runtime types: Correct Solution

Given the following type declarations:

public class Soced {
    public Soced iosha(Soced gep) {
        return new Plosting();
    }
}

public class Plosting extends Soced {
    public Soced iosha(Soced gep) {
        return this;
    }
}

public class Aphstist extends Soced {
    public Soced iosha(Soced gep) {
        return gep;
    }
}

...and given the following setup code:

Plosting foo = new Plosting();
Soced bar = new Aphstist();

Part 1

Draw an AST for the following expression, labeling the static type (a.k.a. compile-time type) of each node in the tree:

foo.iosha(foo.iosha(bar))

(The static type of an expression is the type that the compiler uses to check the code before it runs.)

Solution

Part 2

Draw an AST for the same expression, this time labeling the runtime type of each node in the tree.

(The runtime type of an expression is the type of the actual value that appears when the code runs.)

Solution

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